Kinda new to 6max. Some 2/4 hands for analysis?

A while back, started playing PLO, made 11K at a live 4/8 game, and was playing 50NL6max for a PLO break until yesterday when I followed an utter fish to a 2/4$ table. Found leaks in players and decided to stick around.

Hand 1 (This guy was pretty loose but nothing special. Not too passive, neither too aggro. Perhaps 24/15 w/a decent AF. He'd been stealing a fair amount):

PokerStars No-Limit Hold'em, $4 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($1059.05)
UTG ($211.25)
MP ($253.65)
Button ($869.10)
Hero ($301.25)

Preflop: Hero is SB with Q, K.
2 folds, Button raises to $14, Hero calls $12, 1 fold.

Flop: ($32) T, Q, 5 (2 players)
Hero checks, Button bets $21, Hero raises to $72, Button raises to $855.1, Hero calls $215.25 (All-In).

Turn: ($1174.35) 8 (2 players, 1 all-in)

River: ($1174.35) 7 (2 players, 1 all-in)

Final Pot: $1174.35


Hand 2(same villian):

PokerStars No-Limit Hold'em, $4 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($898.35)
MP ($54.10)
Button ($421.30)
Hero ($859.40)
BB ($52.50)

Preflop: Hero is SB with Q, Q.
1 fold, MP calls $4, Button raises to $20, Hero raises to $60, 1 fold, MP folds, Button calls $40.

Flop: ($128) 6, 3, 7 (2 players)
Hero bets $92, Button calls $92.

Turn: ($312) J (2 players)
Hero bets $310, Button calls $269.30 (All-In).

River: ($891.30) 7 (2 players, 1 all-in)

Final Pot: $891.30

Hand 3(Villian is about 30/20):

PokerStars No-Limit Hold'em, $4 BB (4 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($852.35)
Button ($203.15)
SB ($218.50)
Hero ($482.10)

Preflop: Hero is BB with 5, 5.
UTG raises to $16, 2 folds, Hero calls $12.

Flop: ($34) J, 3, 3 (2 players)
Hero checks, UTG bets $32, Hero raises to $72, UTG calls $40.

Turn: ($178) 8 (2 players)
Hero bets $152, UTG raises to $500, Hero folds.

Final Pot: $830


Hand 4(Villian is biiig donkey):

PokerStars No-Limit Hold'em, $4 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($467.30)
BB ($261.90)
UTG ($672.05)
MP ($67.15)
Hero ($400)
Button ($128.70)

Preflop: Hero is CO with Q, K.
2 folds, Hero raises to $16, 2 folds, BB calls $12.

Flop: ($34) A, 8, 5 (2 players)
BB checks, Hero bets $28, BB calls $28.

Turn: ($90) K (2 players)
BB checks, Hero checks.

River: ($90) 5 (2 players)
BB bets $80, Hero calls $80.

Final Pot: $250

Last hand(pretty unknown villian, but not one who got out of line):

PokerStars No-Limit Hold'em, $4 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($372)
MP ($317.45)
CO ($478)
Button ($207.80)
Hero ($811.80)
BB ($400)

Preflop: Hero is SB with Q, K.
4 folds, Hero raises to $16, BB calls $12.

Flop: ($32) 7, 7, 3 (2 players)
Hero checks, BB checks.

Turn: ($32) Q (2 players)
Hero checks, BB bets $20, Hero calls $20.

River: ($72) K (2 players)
Hero bets $40, BB raises to $140, Hero folds.

Final Pot: $252

hand 1: meh, villain probly has a FD but this isnt the greatest play.

hand 2: questionable.

hand 3: spew

hand 4: spew

hand 5: you made your 2 pair on the river and then fold. Even though teh board is paired i think you have to atleast call the river raise.

Why is hand 2 questionable? Should I just check/fold the turn flush card? I find that slightly weak.
Hand 5: why call? what is he raising the river with that I beat? If he thinks I'm taking a stab at the pot, surely raising accomplishes nothing since I fold everything but a better hand than his